[Shotimes] Rod shifter/exhaust question

[Paul Nimz]

Is that ID or OD?

Paul Nimz
'97 TR
'93 EG mtx


----- Original Message ----- 
From: <cmichaelo@optonline.net>
To: "Ed Cizmar" <ecizmar@earthlink.net>
Cc: "ROBERT SCHIRMER" <1surferbum@msn.com>; "Ian Fisher" 
<dataflash@yahoo.com>; <shotimes@autox.team.net>
Sent: Thursday, October 28, 2004 12:26 PM
Subject: Re: [Shotimes] Rod shifter/exhaust question


> Ed,
>
> Here's a relatively cheap way to fabricate an "optimal" 2 1/2" catback 
> system for the SHO.
>
> First, I'd buy the Dynomax system, which is basically a 2 1/4" system, 
> though with a 2 1/2" piping used for the snake section.  I would then drop 
> the 2 1/4" resonator section and have that section custom fabricated in 2 
> 1/2" piping with your own personal resonator (many seem to prefer 
> Magnaflow.)
>
> The Dynomax snake section is already fabricated in 2 1/2" piping, so 
> you're ok with that piece. The only caveat is that the branch section of 
> the Dynomax catback is fabricated in 2 1/4" piping.
>
> However, IMO this won't hurt mid/high-end performance since by the time 
> the exhaust gases reach the branch section the velocity and volume of the 
> gases have sufficiently decreased and thus no longer require 2 1/2" to 
> flow freely. In fact, you may even benefit from keeping the branch section 
> at 2 1/4" since it will increase back pressure at lower RPMs.
>
> So I kind of view this "home made" exhaust as the optimal exhaust for the 
> SHO.
>
> Going 2 1/2" all the way, will hurt low-end performance. Everyone seems to 
> have noticed this. But by compromising right in the middle, and gradually 
> decrease the cross section as you move further backwards, I'm hoping this 
> solve this deficiency somewhat.
>
> Be adviced, however, that if you have a 2 1/4" Y-pipe outlet, you won't 
> benefit anything from the 2 1/2" catback. You'd have to cut out the 2 1/4" 
> Y-pipe outlet and have a 2 1/2" outlet welded in. (If you're interested, I 
> can tell you more about how exactly to do this, cause I just did it.)
>
>
> Michael
> 94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau
> SHO items for sale: http://hometown.aol.com/cmichaelo/for_sale.html
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